Flurine® 26502,26702,26703 and 26902 are middle Mooney
Fluoroelastomer, which is comprised of vinylidene fluoride (VF2) and hexafluoropropylene (HFP), frequently used in many industries
including automotive, fluid power, appliance and chemical
industries. They have good ductility and be excellent resistant to
oils, fuels, aliphatic series, aromatic hydrocarbons, lubricants,
and most mineral acids.

General

Features

Middle Mooney viscosity

Uses

Shaft seals, gaskets, molded tubing,oil seals, diaphragm, sheets

Forms

White or light-yellow flake

Items

Typical Value

Test Method

26502

26702

26703

26902

Physical Properties

Fluorine Content(mass%)

66

66

66

66

Density(g/cc)

1.81~1.83

1.81~1.83

1.81~1.83

1.81~1.83

ASTM D297

Mooney Viscosity

50~59

70~79

65~85

90~99

ASTM D1646 ML 1+10 at 121°C

Water content

0.10

0.10

0.10

0.10

ASTM D 5668

Solubility

Soluble in lower ketones and esters

Vulcanization Properties

T10(s)

<120

<110

<160

<100

ASTM D5289

T90(s)

<230

<210

<270

<190

ASTM D5289

Mechanical Properties

Tensile strength(MPa)

14.0

14.5

13.5

15.0

ASTM D412 Method A

100% Modulus

5.2

5.5

5.6

6.0

ASTM D412 Method A

Elongation at Break(%)

190

180

170

170

ASTM D412 Method A

Tearing Strength(KN/m)

20

21

20

22

ASTM D624

Hardness, Shore A

76

76

78

76

ASTM D2240, Type A

Compression Set

18

17

18

16

ASTM D395, Test B 70 hours at 200℃

Air-oven aging

ISO 188 After Dry Heat Aging;70 hours at 230℃

Tensile strength change rate(%)

+5

+3

+6

+1

ASTM D412 Method A

Elongation at Break change rate(%)

-6

-5

-3

-3

ASTM D412 Method A

Hardness change, Shore A

0

0

0

0

ASTM D2240, Type A

Thermal Properties

Glass Transition Temp, Tg(℃)

-20

-20

-20

-20

ASTM D1329

Brittleness Temperature(℃)

-30

-30

-30

-30

ASTM D2137

Chemical resistance Properties

Resistance to liquids

3 # standard oil

Volume change rate(%)

+2

+2

+2

+1

ASTM D471 72 hours at 150℃

Mass change rate(%)

+1

+1

+1

+1

ASTM D471 72 hours at 150℃

Formulation

Curingcondition

Polymer 100 MT carbon black,N990 30

Calcium hydroxide 6 Magnesium oxide 3

Fluorocure-5# 2.5

Press

Oven

6min at 175°C

24h at 230°C

Process safety instructions

Store and use all fluoroelastomers only in a well-ventilated area.

Do not smoke in areas contaminated with dust from fluoroelastomers.

Avoid eye contact. After handling fluoroelastomers wash any skin
that came in contact with the product with soap and water.

Potential hazards, including evolution of toxic vapors, exist
during compounding or processing under high temperatures.

Before processing the fluoroelastomers, read and consult the MSDS,
and follow all label directions and operation cautions..

Packaging and storage

Fluoroelastomers be packed in PVC bags in the shape of rubber film,
each bag weight 5KGS, and finally be put into a carton. Each carton
contains 5 bags with net weight 25KGS.

It must be stored in a clean, cool, and dry place. The storage life
is one year from the date of production. It must be re-inspected if
over one year and only can use if qualified.

It is transported as non-dangerous chemicals. Avoid excessive
vibration and far away from pollution, sunshine and water during
the transport.